Even Fibonacci numbers.py

"""
Each new term in the Fibonacci sequence is generated by adding the previous two terms. 
By starting with 1 and 2, the first 10 terms will be:

1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...

By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.
"""

def fibonacci():
    fib = [1,2]
    while fib[-1]+fib[-2] < 4000000:
        fib.append(fib[-1]+fib[-2])

    return sum(x for x in fib if x%2==0)

if __name__ == '__main__':
    print(fibonacci())